Electric tubing connecter



June 18, 1935.

G. G. WILLIAMS ELECTRIC TUBING CONNECTER Filed Sept. 23, 1953 Snventor (Ittorn eg 5 conduits ini'the form of which may be readily Patented June 18, 1935 I Application My invention relates to an electric tubing con necter, and the objects of myinvention are:

' First, to provide a connecter-which is particularly' 'sui'te'd for use conjunction 'with electric or the like;- Secondfto provide a I i which does not constri'ct or bend the tubing, 1 but so firmly wedge "orsecures the tubing that lengths of tubing jomed by the'conn'ecter may withstand an excessive tension strain Without giving way at the connection between the tubing andconnecter;

"Third-to provide 2. connecter of this class adapted toform the varifor the installation of an ous fittings necessary electric conduit;

Fourth, to provide a connecter of this class which is particularly simple of installation even in awkward places and places difficult of access;

and I Fifth, to provide on the whole a novelly constructed electric tubing connecter which is par ticularly simple and economical of manufacture, durable, eificient in its actions, and which will not readily deteriorate or get out of order.

With these and other objects in view as appear hereinafter, my invention consists of certain novel features of construction, combination,

and arrangement. of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawing and to the characters of reference thereon which form.

a part of this application, in which: Figure. 1 is a partial sectional partial side elevational view of my connecter embodied in a 0011- pling member and in an end fitting and taken substantially along the line I-I of Fig. 2; Fig. 2isan-- other partial sectional partial elevational view thereof at right angles to Fig. l and taken through 2-2 thereof; Fig. 3 is a transverse sectional view through 3-3 of Fig. 2 with the securing wedge and screw omitted; Fig. 4 is a similar sectional view with the wedge and screw in position; Fig. 5 is an endelevational view of the form of my connecter when used as an end fitting; Fig. 6 is a side elevational view of the wedge member, and Fig. '7 is a plan view thereof.

Similar characters of reference refer to similar parts and portions throughout the several views of the drawing.

My electrictubing connecter is particularly suited for use in conjunction with tubing which V w g I 2,005,174 a .6 I: 1.1- ELECTRIC TUBING CONNECT [-oershbmo. Williams, Li'iarapfa.

steel tubing, the walls. of which are too thin for threaded'connection connecter of this class forms a guide channel 5.

September-23,1933, SerialNo.9o,e9o 1 4.0laims. (01.1247421) I has --relatively thin walls] and is usually m nes of steel. This form of tubing is supplanting tl-i'e conventional pipe conduit having relatively" thick walls and utilizing ,"co'n'ventional screw fittings: With steel tubing the thinness of the vfallspre vents the formation of screw "threads and the conventional clamp constricts' the tubing 01* dents I the walls so that the'dnterior doesnot maintain a-uniform cross-section. This not only intr feres with the drawing of wi res through thetubing but also providesflplaces wherethe'i tion may be caused to wear"thin. pling the-.tubing lislfirmly held yet are not crushed or dente'di k 1 .I The fitting or connecter embodied in the draw-'- ing, when used. as azcoupling between two-lengths of tubing T, isin the form of a sleeve I witfi a bore therethrough adapted to receive the end of the tubing, as shown best in Fig. 2. The bore of the sleeve I is provided at its central portion with a constriction or internal ridge '2 which limits the insertion of the tubing. The wall of boss or bosses 3 near each end of the sleeve I.

Near each end the sleeve I is provided with a substantially tangentiallyextending bore the outer portion of which is screw-threaded, as indicated byl, and the innerportion of which sects the bore of the sleeve I and curves in substantialconformity thereto to form a channel which diminishes in heightdefining a wedgeshaped space. Said wedge-shaped space curves downwardly or towards the bore of the sleeve, I

as shown best in Fig. 3, and is adapted to receive a wedge member 6. The Wedge member is sufliciently small to fit the screw-threaded por- The portion, 5 intertion 4 and is sufliciently yieldable so thatwhen f engaged by a screw I and the screw is turned in the screw-threaded portion II, said wedge 6 is forced inwardly and bent by reason of contact with the radially outer side of the guide portion '5 into conformity with the outer periphery of the tubing T, as shown in Fig. 4. It should be noted that the taper of the wedge and the taper of the guide slot or channel 5 as defined when the tubing is in place is approximately the same so that when the wedge 6 is bent, as shownin Fig. t, its inner side conforms to the periphery of the tubing, and by reason of therelatively large area of contact engages the tubing with considerable frictional force without indenting I the same but at the same time so firmly'wedging the tubing relative to the connecter that a tento permit connection with conventional conduitpipe or to switch boxes and other similar devices.

Though I have shown and described .a partlcular construction, combination. and arrangement of parts and portions, '1 donot wish to be limited to this'particular construction, co'mbinae tion and arrangement, but desire to include in.

the scope of my invention the construction, combination and arrangement substantially {as set forth in the appended claims;

, Having thus described-my invention, what'I claim. as new and desire to-,-securey by: Letters a consisting of, a cylinder member adapted to receive a tubing ineith'er endportion, a screw and Patent is:- I "1. An electric itubing connecter-consisting of,

. a socket portion adapted, to receive the end of electric tubing, a screw and .wedge receiving means associated with said socket portioniand disposed with its axis-in substantially tangential relation; with the axis of saidsocketzportion, a;

' relatively long thin tapering .wedge means disposed at the inner portion of saidreceiving means and a screw engageable with'said receiving means to force the wedge means tangentially into wedging a curved relation between the socket and tubing.

2. An electric tubing connecter consisting of, means for receiving an endof an electric tubing and incorporating a relatively long thin tapering wedge guiding element exposed to' said tubing, a

relatively long thin tapering wedge member fitting said wedge guiding element and. means mounted insaid electric tubing receiving means for engaging and'forcing the wedge member between said'wedge guiding element and said tub- I =curving the same into conformity, with said tubing.

4. I The c bi ation with thin solid walled tubing for receiving electric wires, of a connecter wedge receiving means carried by each end portion, each means disposed in substantially tangential relation and its inner portion exposed to the periphery of thetubing received by the cylinder member, a relatively long thin tapering wedge fitting the inner portion of said means, and a screw fitting the outer portion of said means and engageable with the thicker end of said wedge 'to relatively bind the cylinder member and tubing.

' GERSHOM G. WILLIAMS. 

